<?php
/**
 * Created by PhpStorm.
 * User: Administrator
 * Date: 2017/12/20
 * Time: 21:22
 */


function saveUserHeadImg($downls){
    if($downls == ''){
        $return_head_img='default.jpg';
    }else{
        $downl=str_replace("/0", "/132", "$downls");
        $saveDir = "./Public/upload/user_head";
        $fileName = uniqid().".jpg";
        $return_head_img = getImage($downl, $saveDir, $fileName,1);
        if($return_head_img['error']==0){
            $return_head_img = $fileName;
        }else{
            $return_head_img='default.jpg';
        }
        $file_size = filesize("./Public/upload/user_head/".$return_head_img);
        if($file_size==0){
            $return_head_img='default.jpg';
        }
    }
    return $return_head_img;
}

function getImage($url,$save_dir='',$filename='',$type=0){
    if(trim($url)==''){
        return array('file_name'=>'','save_path'=>'','error'=>1);
    }
    if(trim($save_dir)==''){
        $save_dir='./';
    }
    if(trim($filename)==''){//保存文件名
        $ext=strrchr($url,'.');
        if($ext!='.gif'&&$ext!='.jpg'&&$ext!='.png'&&$ext!='.jpeg'){
            return array('file_name'=>'','save_path'=>'','error'=>3);
        }
        $filename=time().rand(0,10000).$ext;
    }
    if(0!==strrpos($save_dir,'/')){
        $save_dir.='/';
    }
    //创建保存目录
    if(!file_exists($save_dir)&&!mkdir($save_dir,0777,true)){
        return array('file_name'=>'','save_path'=>'','error'=>5);
    }
    //获取远程文件所采用的方法
    if($type){
        $ch=curl_init();
        $timeout=5;
        curl_setopt($ch,CURLOPT_URL,$url);
        curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
        curl_setopt($ch,CURLOPT_CONNECTTIMEOUT,$timeout);
        $img=curl_exec($ch);
        curl_close($ch);
    }else{
        ob_start();
        readfile($url);
        $img=ob_get_contents();
        ob_end_clean();
    }
    //$size=strlen($img);
    //文件大小
    $fp2=@fopen($save_dir.$filename,'a');
    fwrite($fp2,$img);
    fclose($fp2);
    unset($img,$url);
    return array('file_name'=>$filename,'save_path'=>$save_dir.$filename,'error'=>0);
}

function get_rand($proArr) {
    $result = array();
    foreach ($proArr as $key => $val) {
        $arr[$key] = $val['v'];
    }
    // 概率数组的总概率
    $proSum = array_sum($arr);
    asort($arr);
    // 概率数组循环
    foreach ($arr as $k => $v) {
        $randNum = mt_rand(1, $proSum);
        if ($randNum <= $v) {
            $result = $proArr[$k];
            break;
        } else {
            $proSum -= $v;
        }
    }
    return $result;
}